气候变化领域集成服务门户(CCPortal): Ground level ice nucleating particles measurements at Capo Granitola; a Mediterranean coastal site

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DOI	10.1016/j.atmosres.2018.12.022
	Ground level ice nucleating particles measurements at Capo Granitola; a Mediterranean coastal site
	Rinaldi M.; Nicosia A.; Santachiara G.; Piazza M.; Paglione M.; Gilardoni S.; Sandrini S.; Cristofanelli P.; Marinoni A.; Bonasoni P.; Facchini M.C.; Belosi F.
发表日期	2019
ISSN	0169-8095
起始页码	57
结束页码	64
卷号	219
英文摘要	This study presents near-surface measurements of ice nucleating particle (INP) concentrations at a ground level Mediterranean site (Capo Granitola, CGR), located in southern Sicily. A coastal area like CGR can be influenced by marine and anthropogenic aerosols, and even by Saharan dust. To obtain the INP concentration in the PM 1 and PM 10 fractions, an experimental campaign was carried out in April 2016 at the WMO/GAW “I-AMICA” Observatory. Aerosol was sampled on nitrocellulose membranes twice a day. INP concentrations were detected by a dynamic filter processing chamber (DFPC), a replica of the Langer dynamic chamber, at −18 °C and − 22 °C activation temperatures, at different conditions of supersaturation with respect to ice and water. The sampling period was characterized by three main wind directions, along the coast (from North-West and from South-East), during daytime, and mainly from the land side during the night. INP concentration, in the PM 10 size fraction, ranged 0.5–27, 3.3–65 and 13–115 m −3 , at −18 °C below water saturation, at −18 °C at water supersaturation and at −22 °C at water supersaturation, respectively. Two weak dust transport events occurred during the experimental campaign, both characterized by an increase in coarse particle number and PM 10 concentration, not associated with fine particles or other pollutants. Air mass back-trajectories, during the events, were observed to originate from the North African region. Results of the experimental campaign were compared with INP concentrations previously measured at San Pietro Capofiume, a rural site in the Po Valley, and at Mt. Cimone (“O. Vittori” Italian Climate Observatory, 2165 m a.s.l) in the northern Apennines. Both INP concentrations, in the PM 1 and PM 10 fractions, and activated fractions, at CGR, were prevalently lower than the concentrations obtained at the other two sites. This may be, likely, related to the lower nucleation efficiency of soluble marine aerosols and aged dust particles, partly coated and mixed with hygroscopic material, at CGR. © 2018
英文关键词	Heterogeneous freezing; Ice nucleating particles; Particle number concentration; Saharan dust transport
语种	英语
scopus关键词	Aerosols; Dust; Observatories; Supersaturation; Surface measurement; Activation temperatures; Air mass back trajectories; Anthropogenic aerosols; Heterogeneous freezing; Near-surface measurements; Nitrocellulose membranes; Particle number concentration; Saharan dust; Ice; aerosol; coastal zone; concentration (composition); dust; freezing; ice; nucleation; particulate matter; sediment transport; Italy; Mediterranean Region; Sicily
来源期刊	Atmospheric Research
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/162204
作者单位	Institute of Atmospheric Sciences and Climate, ISAC-CNR, via Gobetti 101, Bologna, 40129, Italy
推荐引用方式 GB/T 7714	Rinaldi M.,Nicosia A.,Santachiara G.,et al. Ground level ice nucleating particles measurements at Capo Granitola; a Mediterranean coastal site[J],2019,219.
APA	Rinaldi M..,Nicosia A..,Santachiara G..,Piazza M..,Paglione M..,...&Belosi F..(2019).Ground level ice nucleating particles measurements at Capo Granitola; a Mediterranean coastal site.Atmospheric Research,219.
MLA	Rinaldi M.,et al."Ground level ice nucleating particles measurements at Capo Granitola; a Mediterranean coastal site".Atmospheric Research 219(2019).